/* ===========================================
   Features – Tabbed Card Grid
   =========================================== */

/* ---------- HERO HEADER ---------- */

.feat-hero {
  padding: var(--space-4xl) 0 var(--space-3xl);
  position: relative;
}

.feat-hero-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 var(--space-xl);
}

.feat-hero-accent {
  width: 48px;
  height: 4px;
  background: var(--primary);
  border-radius: var(--radius-pill);
  margin-bottom: var(--space-2xl);
}

.feat-hero-breadcrumb {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--graphite);
  margin-bottom: var(--space-lg);
}

.feat-hero-breadcrumb a {
  color: var(--graphite);
  text-decoration: none;
  transition: color var(--transition);
}

.feat-hero-breadcrumb a:hover {
  color: var(--primary);
  text-decoration: none;
}

.feat-hero-breadcrumb-sep {
  color: var(--steel);
  font-weight: 400;
}

.feat-hero-breadcrumb-current {
  color: var(--ink);
}

.feat-hero-row {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: var(--space-xl);
  flex-wrap: wrap;
}

.feat-hero-text h1 {
  font-size: clamp(2rem, 5vw, 3.2rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--ink);
  margin-bottom: var(--space-sm);
}

.feat-hero-text .subtitle {
  font-size: 1rem;
  color: var(--graphite);
  font-weight: 400;
  max-width: 520px;
  line-height: 1.7;
}

.feat-hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 18px;
  background: var(--primary-soft);
  color: var(--primary);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  border-radius: var(--radius-pill);
  white-space: nowrap;
  flex-shrink: 0;
}

.feat-hero-badge i {
  font-size: 0.7rem;
}

/* ---------- TAB BAR ---------- */

.feat-tabs-wrapper {
  background: var(--canvas);
  border-bottom: 1px solid var(--fog);
  position: sticky;
  top: var(--nav-h);
  z-index: 100;
}

.feat-tabs {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 var(--space-xl);
  display: flex;
  gap: 4px;
  overflow-x: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
}

.feat-tabs::-webkit-scrollbar {
  display: none;
}

.feat-tab {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 12px 20px;
  font-family: var(--font-sans);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--graphite);
  background: transparent;
  border: none;
  border-bottom: 2px solid transparent;
  cursor: pointer;
  transition: all var(--transition);
  white-space: nowrap;
  flex-shrink: 0;
}

.feat-tab:hover {
  color: var(--ink);
}

.feat-tab.active {
  color: var(--primary);
  border-bottom-color: var(--primary);
}

.feat-tab-count {
  font-size: 0.6rem;
  font-weight: 400;
  opacity: 0.5;
  letter-spacing: 0;
}

/* ---------- CATEGORY CONTENT ---------- */

.feat-content {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 var(--space-xl);
}

.feat-cat-panel {
  display: none;
  padding: var(--space-3xl) 0;
}

.feat-cat-panel.active {
  display: block;
}

.feat-cat-header {
  margin-bottom: var(--space-2xl);
}

.feat-cat-label {
  display: inline-block;
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--primary);
  margin-bottom: var(--space-sm);
}

.feat-cat-title {
  font-size: clamp(1.4rem, 3vw, 2rem);
  font-weight: 600;
  color: var(--ink);
  letter-spacing: -0.02em;
}

/* ---------- CARD GRID ---------- */

.feat-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
}

@media (max-width: 1024px) {
  .feat-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .feat-grid {
    grid-template-columns: 1fr;
  }
}

/* ---------- FEATURE CARD ---------- */

.feat-grid-card {
  background: var(--canvas);
  border: 1px solid var(--fog);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition);
}

.feat-grid-card:hover {
  border-color: var(--primary-soft);
  box-shadow: var(--shadow-md);
}

.feat-grid-card.open {
  border-color: var(--primary);
  box-shadow: var(--shadow-md);
}

.feat-grid-card-header {
  padding: var(--space-xl) var(--space-xl) var(--space-md);
  cursor: pointer;
  transition: background-color var(--transition);
}

.feat-grid-card-header:hover {
  background: var(--cloud);
}

.feat-grid-card.open .feat-grid-card-header {
  background: var(--cloud);
}

.feat-grid-card-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background: var(--primary-soft);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  margin-bottom: var(--space-md);
}

.feat-grid-card-num {
  font-size: 0.65rem;
  font-weight: 700;
  color: var(--graphite);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: var(--space-xs);
}

.feat-grid-card-title {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: var(--space-xs);
  letter-spacing: -0.01em;
}

.feat-grid-card-title-en {
  font-size: 0.6rem;
  font-weight: 600;
  color: var(--steel);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-left: 6px;
}

.feat-grid-card-desc {
  font-size: 0.85rem;
  color: var(--graphite);
  line-height: 1.6;
  font-weight: 400;
  margin-bottom: var(--space-md);
}

.feat-grid-card-tags {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.feat-grid-card-stat {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--primary);
  background: var(--primary-soft);
  padding: 3px 10px;
  border-radius: var(--radius-pill);
}

.feat-grid-card-stat i {
  font-size: 0.6rem;
}

.feat-grid-card-badge {
  display: inline-flex;
  align-items: center;
  font-size: 0.6rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 3px 10px;
  border-radius: var(--radius-sm);
}

.feat-grid-card-badge.live {
  background: rgba(45, 95, 62, 0.08);
  color: var(--success);
}

.feat-grid-card-badge.beta {
  background: rgba(2, 74, 216, 0.08);
  color: var(--primary);
  border: 1px solid var(--primary-soft);
}

.feat-grid-card-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  padding: 8px;
  color: var(--steel);
  font-size: 0.7rem;
  transition: all var(--transition);
}

.feat-grid-card.open .feat-grid-card-toggle {
  color: var(--primary);
}

.feat-grid-card.open .feat-grid-card-toggle i {
  transform: rotate(180deg);
}

.feat-grid-card-toggle i {
  transition: transform var(--transition);
}

/* ---------- CARD EXPAND DETAIL ---------- */

.feat-grid-card-detail {
  display: none;
  border-top: 1px solid var(--fog);
  padding: var(--space-lg) var(--space-xl) var(--space-xl);
  background: var(--cloud);
}

.feat-grid-card.open .feat-grid-card-detail {
  display: block;
}

.feat-grid-card-detail-desc {
  font-size: 0.85rem;
  line-height: 1.8;
  color: var(--charcoal);
  margin-bottom: var(--space-lg);
  font-weight: 400;
}

.feat-grid-card-detail-attrs {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0;
}

.feat-detail-attr {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 0;
  border-bottom: 1px solid var(--fog);
  gap: 12px;
}

.feat-detail-attr:last-child {
  border-bottom: none;
}

.feat-detail-attr-key {
  font-size: 0.75rem;
  font-weight: 400;
  color: var(--graphite);
  white-space: nowrap;
}

.feat-detail-attr-val {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--ink);
  text-align: right;
}

.feat-detail-attr-val .fa-check {
  color: var(--success);
  font-size: 0.65rem;
}

/* ---------- METRICS BANNER ---------- */

.feat-metrics {
  background: var(--ink);
  padding: var(--space-3xl) 0;
}

.feat-metrics-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 var(--space-xl);
}

.feat-metrics-label {
  font-size: 0.6rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.35);
  margin-bottom: var(--space-xl);
}

.feat-metrics-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
}

.feat-metric {
  padding: 0 var(--space-2xl);
  border-left: 1px solid rgba(255, 255, 255, 0.08);
}

.feat-metric:first-child {
  border-left: none;
  padding-left: 0;
}

.feat-metric:last-child {
  padding-right: 0;
}

.feat-metric-num {
  font-size: clamp(2rem, 4.5vw, 3.2rem);
  font-weight: 700;
  color: #FFFFFF;
  letter-spacing: -0.03em;
  line-height: 1;
  margin-bottom: 8px;
}

.feat-metric-label {
  font-size: 0.8rem;
  color: rgba(255, 255, 255, 0.45);
  font-weight: 400;
  line-height: 1.5;
}

/* ---------- CTA SECTION ---------- */

.feat-cta {
  background: var(--ink);
  padding: var(--space-5xl) 0;
  text-align: center;
}

.feat-cta-inner {
  max-width: var(--max-w-narrow);
  margin: 0 auto;
  padding: 0 var(--space-xl);
}

.feat-cta-title {
  font-size: clamp(1.6rem, 3.5vw, 2.4rem);
  font-weight: 600;
  color: #FFFFFF;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-md);
}

.feat-cta-subtitle {
  font-size: 1rem;
  color: rgba(255, 255, 255, 0.5);
  font-weight: 400;
  line-height: 1.7;
  margin-bottom: var(--space-2xl);
  max-width: 480px;
  margin-left: auto;
  margin-right: auto;
}

.feat-cta-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
}

/* ---------- RESPONSIVE: 1024px ---------- */

@media (max-width: 1024px) {
  .feat-hero {
    padding: var(--space-3xl) 0 var(--space-2xl);
  }

  .feat-hero-row {
    flex-direction: column;
    align-items: flex-start;
  }

  .feat-metrics-inner {
    padding: 0 var(--space-2xl);
  }

  .feat-metrics-row {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-2xl) 0;
  }

  .feat-metric {
    padding: 0 var(--space-xl);
    border-left: none;
  }

  .feat-metric:nth-child(2n + 1) {
    padding-left: 0;
  }

  .feat-metric:nth-child(2n) {
    padding-right: 0;
  }
}

/* ---------- RESPONSIVE: 768px ---------- */

@media (max-width: 768px) {
  .feat-hero-inner, .feat-content, .feat-metrics-inner, .feat-cta-inner {
    padding-left: var(--space-lg);
    padding-right: var(--space-lg);
  }

  .feat-hero {
    padding: var(--space-2xl) 0 var(--space-xl);
  }

  .feat-hero-accent {
    margin-bottom: var(--space-xl);
  }

  .feat-hero-breadcrumb {
    margin-bottom: var(--space-md);
  }

  .feat-tabs {
    padding: 0;
    gap: 0;
  }

  .feat-tab {
    padding: 12px 14px;
    font-size: 0.7rem;
    letter-spacing: 0.04em;
  }

  .feat-tab-count {
    display: none;
  }

  .feat-cat-panel {
    padding: var(--space-xl) 0;
  }

  .feat-cat-header {
    margin-bottom: var(--space-lg);
  }

  .feat-grid-card-header {
    padding: var(--space-lg) var(--space-lg) var(--space-md);
  }

  .feat-grid-card-detail {
    padding: var(--space-md) var(--space-lg) var(--space-lg);
  }

  .feat-grid-card-detail-attrs {
    grid-template-columns: 1fr;
  }

  .feat-metrics {
    padding: var(--space-2xl) 0;
  }

  .feat-metrics-row {
    grid-template-columns: 1fr 1fr;
  }

  .feat-metric {
    padding: var(--space-md) var(--space-md);
  }

  .feat-metric:nth-child(odd) {
    border-right: 1px solid rgba(255, 255, 255, 0.08);
  }

  .feat-cta {
    padding: var(--space-3xl) 0;
  }

  .feat-cta-actions {
    flex-direction: column;
    width: 100%;
  }

  .feat-cta-actions .btn {
    width: 100%;
    justify-content: center;
  }
}